understand halves, thirds, and fourths in shapes name · ©urriculum ssociates opying is not...
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©Curriculum Associates, LLC Copying is not permitted. 291Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Name:
How can you break shapes into equal parts?
Study the example showing how to draw equal parts. Then solve Problems 1–8.
1 Draw 2 equal parts Circle the word that describes the parts
2 Write how many equal parts Circle the word that describes the parts
equal parts
3 Write how many equal parts Circle the word that describes the parts
equal parts
Draw 4 equal parts. Circle the word that describes the parts.
halves
fourths
half of the whole
2 equal parts
fourth of the whole
4 equal parts
Lesson 28
Understand Halves, Thirds, and Fourths in Shapes
halves
fourths
halves
fourths
halves
fourths
©Curriculum Associates, LLC Copying is not permitted.292 Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Solve.
4 Draw 2 equal parts Circle the word that describes the parts
5 Draw 4 equal parts Circle the word that describes the parts
6 Draw 2 equal parts a different way than you did in Problem 4
7 Draw 4 equal parts a different way than you did in Problem 5
8 Vicky says she shaded half of this square Do you agree? Why or why not?
halves
fourths
halves
fourths
©Curriculum Associates, LLC Copying is not permitted. 293Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Name:
Divide Rectangles into Halves, Thirds, and Fourths
Study the example showing how to divide a rectangle into equal parts. Then solve Problems 1–9.
1 Divide this rectangle into two equal parts
2 Circle the word to the right that makes this sentence true about the rectangle in Problem 1
Each part is a of the whole rectangle
3 Show another way to divide a rectangle into two equal parts
Example
Divide this rectangle into equal parts.
Lesson 28
one half
2 equal parts
one third
3 equal parts
one fourth
4 equal parts
half
third
fourth
©Curriculum Associates, LLC Copying is not permitted.294 Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Solve.
4 Divide this rectangle into three equal parts
5 Circle the word to the right that makes this sentence true about the rectangle in Problem 4
Each part is a of the whole rectangle
6 Show another way to divide a rectangle into three equal parts
7 Divide this rectangle into four equal parts
8 Circle the word to the right that makes this sentence true about the rectangle in Problem 7
Each part is a of the whole rectangle
9 Show another way to divide a rectangle into four equal parts
half
third
fourth
half
third
fourth
©Curriculum Associates, LLC Copying is not permitted. 295Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Name:
Reason and Write
Look at the example. Underline a part that you think makes it a good answer.
Example
Cho drew these circles
Cho wrote, My picture shows that a pie cut in thirds has bigger pieces than the same pie cut in half
What did Cho do right? What did he do wrong? Use pictures, words, or numbers to explain
Cho showed thirds and halves correctly. The first circle is divided into 3 equal parts. The second circle is divided into 2 equal parts.
Cho’s mistake was that he drew the circles different sizes. He should have drawn the circles the same size. That is because he is trying to show the same pie cut two different ways.
Cho should have drawn his circles like this. Then he would see that a pie cut in thirds has smaller pieces than the same pie cut in half.
Lesson 28
Where does the example . . .• answer both
parts of the question?
• use words to explain?
• use numbers to explain?
• use a picture to explain?
©Curriculum Associates, LLC Copying is not permitted.296 Lesson 28 Understand Halves, Thirds, and Fourths in Shapes
Solve the problem. Use what you learned from the example.
Alma drew these squares
Alma wrote, My picture shows that a cracker broken into thirds has smaller pieces than the same cracker broken into fourths
What did Alma do right? What did she do wrong?
Show your work. Use pictures, words, or numbers to explain Did you . . .
• answer both parts of the question?
• use words to explain?
• use numbers to explain?
• use a picture to explain?